To extract the boot sector from the original Windows 2000 bootable cd with Goldenhawk CDRWIN :

1. Start CDRWIN and choose the "'Extract Disc/Tracks/Sectors"
2. Select Extract mode "Select Sectors"
3. Set image file to be (Drive Letter):\win2kboot\boot.bin
4. Set File Format to be Automatic
5. Set the sector selection to sector 20 (by setting start- and end-sector to 20)
6. Set Data Mode to "Mode1 (2048)" and press start

Note if the above steps seems cumbersome, then one can just download win2kboot.zip and extracting BOOT.BIN to a new folder (Drive Letter):\win2kboot\

More Info Bart's Boot Image Extractor a command line tool to extract the bootsector.
More Info Bart's way to create bootable CD-Roms